A chemical sensor that can induce near-infrared red-shifted response represents a promising strategy for the design and development of anion probes. In this work, novel CH-controlled colorimetric probe 3 based on anthracene carboximide was developed for near-infrared detection of cyanide. Probe 3 consisted of CHCN binding site to anthracene carboximide fluorophore, and showed a significant visual change from yellow-green (535 nm) to deep violet (825 nm) with a larger redshift (≈ 290 nm) and fluorescence quenching at 480 nm and 520 nm upon interacting with cyanide. Job curves determined 1:1 binding stoichiometry of probe 3 with cyanide. Additonally, probe 3 detected cyanide ion conveniently in aqueous solution and could be reused after trifluoroacetic acid treatment. Colorimetric test paper was used to detect cyanide in aqueous solutions. The C–H deprotonation sensing mechanism was confirmed by ¹H NMR titration. The near-infrared detection of cyanide by CH-controlled probes was founded for the first time.

可以诱导近红外红移响应的化学传感器代表了阴离子探针设计和开发的有前途的策略。在这项工作中，开发了基于蒽甲酰亚胺的新型 CH 控制比色探针3，用于氰化物的近红外检测。探针3包含与蒽甲酰亚胺荧光团结合的 CH3CN 结合位点，并显示出从黄绿色 (535 nm) 到深紫色 (825 nm) 的显着视觉变化，具有较大的红移 (≈ 290 nm) 以及在 480 nm 和 520 处的荧光猝灭nm 与氰化物相互作用。工作曲线确定了探针3与氰化物的 1:1 结合化学计量。此外，探头3方便地检测水溶液中的氰离子，经三氟乙酸处理后可重复使用。比色试纸用于检测水溶液中的氰化物。^通过1 H NMR 滴定证实了 C-H 去质子化传感机制。首次建立了CH控制探针对氰化物的近红外检测。